2 years ago

9α – 8α Can someone please answer this question ty

Mathematics

1 answer:

Andrei [34K]2 years ago

5 0

1a (you don’t necessarily need to include the 1, so you can just put “a” if you’d like).

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Please help me find y

sertanlavr [38]

Answer:

Step-by-step explanation:

cos 60° = y / 10

y = 10 * 1/2 = 5

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3 years ago

Marco can finish a jigsaw puzzle in 3 hours. Working together with Cliff, it takes them 1 hour. How

vovikov84 [41]

Macro can finish the puzzle in 3 hours. We can say that her speed for working is 1/3 or 1/3 puzzle per hour.

Now if they work together, this turns into 1 puzzle per hour.

That must mean that Cliff would be doing the other 2/3 of the puzzle while Macro does his 1/3 in that hour. If Cliff has a speed of doing them 2/3 per hour. Then it would take 1 and a half hour to finish 1 whole puzzle.

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3 years ago

Solve for a: a(a-3) =100

marissa [1.9K]

$a(a-3) =100\\
a^2-3a-100=0\\
\Delta=(-3)^2-4\cdot1\cdot(-100)=9+400=409\\
\sqrt{\Delta}=\sqr{409}\\
a_1=\dfrac{-(-3)-\sqrt{409}}{2\cdot1}=\dfrac{3-\sqrt{409}}{2}\\
a_2=\dfrac{-(-3)+\sqrt{409}}{2\cdot1}=\dfrac{3+\sqrt{409}}{2}$

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3 years ago

During Christmas a book store sold 30 books. If the ratio of books go bookmarks sold was 10:1 ,how many bookmarks did the store

Snowcat [4.5K]

<span>books to bookmarks
books : bookmarks
10 : 1
10 * 3 : 1 * 3
30 : 3
3 bookmarks

Since the book store sold 30 books they also sold 3 bookmarks.

Answer: 3 bookmarks</span>

7 0

3 years ago

in 1990, the value of a home is $170,000. Since then, its value has increased 5% per year. what is the approximate value of a ho

Gwar [14]

value of home in 1991= 105% of 170000

value of home in 1992= 105%×105% of 170000

value of home in 1993= 105%×105%×105% of 170000

=$196,796.25

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3 years ago